If I defended Ash on every occasion in which he is criticized in some way, I'd have a full-time job on my hands. Sometimes I need to let off steam and step in once in a while, but what you guys are doing is pointless.
Any attempts at being some sort of internet police which tries to reason with everyone has failed so far, and you guys will fail as well. Not because your arguments are weak, but because some people are either too unreasonable, don't do their research or simply because they have a different view and opinion on things and are not willing to change it. You're fighting a losing battle. Accept it.
Dawn is a sweetheart and I'd love it if she stayed around for a while longer, but I can't see it. We've seen examples of girls leaving without any foreshadowing at all, or with foreshadowing that may have been timely enough but which was based on the absurd theory that said girl "battles the wrong way".
I wouldn't put it past them to create another of those horrible plot devices, even if there aren't so many episodes left any more. However, if they actually deliver a credible reason for her departure and a goodbye that isn't on the same emotional level as eating cold pasta, I'll be fine with it.